maureen kelly, kron 4 news. >> investigators are still trying to figure out what happened to this a dump truck to you're out of control. and grant of control and sending people to the hospital. the truck driver could not stop and caused a chain reaction and the chp is predicting perhaps a brake failure. the number of fatalities has fallen since 1950. the transportation department says this is to do with a combination of seat belts, safe cars, and a crackdown on the why and this is a. down. the wif the dui crackd0 why. the why alcohol impaired dd it is down. and by returning this will come a good samaritan in berkeley provided evidence in a trial involving a portal stabbing. it happened in 2006 and is good samaritan was gardening on west berkeley when she found his wallet and she sent it anonymously to the victim. the attackers were not convicted. >> this particular what could be a very critical role in the prosecution of this case is currently in the trial. police want to talk to the woman who discovered this and where it was found. the good samaritan came forward after a friend saw this